/**
 * Copyright (C) 2013 DaiKit.com - daikit4gxt module (admin@daikit.com)
 *
 *         Project home : http://code.daikit.com/daikit4gxt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.daikit.daikit4gxt.client.editor;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.editor.client.Editor;
import com.google.gwt.editor.client.EditorError;
import com.google.gwt.editor.client.impl.AbstractSimpleBeanEditorDriver;


/**
 * A base implementation class for generated SimpleBeanEditorDriver implementations.
 * 
 * @param <T>
 *           the type being edited
 * @param <E>
 *           the Editor type
 */
public abstract class DkBeanEditorDriver<T, E extends Editor<T>> extends AbstractSimpleBeanEditorDriver<T, E> implements
		DkSimpleBeanEditorDriver<T, E>
{

	private List<EditorError> validationErrors;

	private void checkObject()
	{
		if (getObject() == null)
		{
			throw new IllegalStateException("Must call edit() first");
		}
	}

	@Override
	public boolean hasErrors()
	{
		return validationErrors != null && !validationErrors.isEmpty();
	}

	@Override
	public List<EditorError> getErrors()
	{
		return validationErrors != null ? validationErrors : new ArrayList<EditorError>();
	}

	/**
	 * Wrapper to {@link #flush(boolean)} with flushEvenIfValidationFails=false
	 */
	@Override
	public T flush()
	{
		return flush(false);
	}

	@Override
	public T flush(final boolean flushEvenIfValidationFails)
	{
		return flush(flushEvenIfValidationFails, false);
	}

	@Override
	public T flush(final boolean flushEvenIfValidationFails, final boolean validateHiddenFields)
	{
		checkObject();
		accept(new DkPreFlushValidator(validateHiddenFields));
		validationErrors = new ArrayList<EditorError>();
		accept(new DkEditorCollector(validationErrors));
		if (flushEvenIfValidationFails || validationErrors.isEmpty())
		{
			accept(new DkFlusher());
		}
		return getObject();
	}
}
